The actor, 28, proudly showed off his bulging biceps and washboard abs, and he let his fans drool over his insane physique by sharing on Instagram some pictures from the set, reported Ace Showbiz.
He first posted a photo of him wearing nothing but black shorts as he is about to swing from a rope.
"Honestly I have a hard time with paparazzi but s/o to this dude," the actor captioned the snap.
Efron later shared another picture of him going shirtless while participating in a tire flipping competition against his co-star, Dwayne "The Rock" Johnson.